1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.dao.orm.hibernate;
24  
25  import com.liferay.portal.kernel.dao.orm.DynamicQuery;
26  import com.liferay.portal.kernel.dao.orm.DynamicQueryFactory;
27  import com.liferay.portal.kernel.log.Log;
28  import com.liferay.portal.kernel.log.LogFactoryUtil;
29  
30  import java.util.HashMap;
31  import java.util.Map;
32  
33  import org.hibernate.criterion.DetachedCriteria;
34  
35  /**
36   * <a href="DynamicQueryFactoryImpl.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Brian Wing Shun Chan
39   */
40  public class DynamicQueryFactoryImpl implements DynamicQueryFactory {
41  
42      public DynamicQuery forClass(Class<?> clazz) {
43          clazz = getImplClass(clazz);
44  
45          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz));
46      }
47  
48      public DynamicQuery forClass(Class<?> clazz, ClassLoader classLoader) {
49          clazz = getImplClass(clazz, classLoader);
50  
51          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz));
52      }
53  
54      public DynamicQuery forClass(Class<?> clazz, String alias) {
55          clazz = getImplClass(clazz);
56  
57          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz, alias));
58      }
59  
60      public DynamicQuery forClass(
61          Class<?> clazz, String alias, ClassLoader classLoader) {
62  
63          clazz = getImplClass(clazz, classLoader);
64  
65          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz, alias));
66      }
67  
68      protected Class<?> getImplClass(Class<?> clazz) {
69          return getImplClass(clazz, null);
70      }
71  
72      protected Class<?> getImplClass(Class<?> clazz, ClassLoader classLoader) {
73          if (!clazz.getName().endsWith("Impl")) {
74              String implClassName =
75                  clazz.getPackage().getName() + ".impl." +
76                      clazz.getSimpleName() + "Impl";
77  
78              clazz = _classMap.get(implClassName);
79  
80              if (clazz == null) {
81                  try {
82                      if (classLoader == null) {
83                          Thread currentThread = Thread.currentThread();
84  
85                          classLoader = currentThread.getContextClassLoader();
86                      }
87  
88                      clazz = classLoader.loadClass(implClassName);
89  
90                      _classMap.put(implClassName, clazz);
91                  }
92                  catch (Exception e) {
93                      _log.error("Unable find model " + implClassName, e);
94                  }
95              }
96          }
97  
98          return clazz;
99      }
100 
101     private static Log _log =
102         LogFactoryUtil.getLog(DynamicQueryFactoryImpl.class);
103 
104     private Map<String, Class<?>> _classMap = new HashMap<String, Class<?>>();
105 
106 }